The pair performed at the Jack Antonoff-organised Ally Coalition benefit concert last night
The fifth annual Jack Antonoff-organised show – which raises funds and awareness for the LGBTQ youth organisation The Ally Coalition – also welcomed performances from the likes of Lana Del Rey (who debuted a selection of new “country songs” with Antonoff), Rostam and Regina Spektor.
During Kiyoko’s set, Swift was invited on stage to perform ‘Delicate’ off her ‘Reputation’ album. The pair sang together as Swift played an acoustic guitar – you can see fan-shot footage of the performance below.
“It’s so great to be at this incredible show,” Swift told those in attendance prior to performing ‘Delicate’.
“Hayley is killing it,” she added. “Her family’s in the audience, so Haley’s killing it, right?”
This wasn’t the first time this year that the pair had performed live together. Earlier this year, Swift invited Kiyoko on stage to perform ‘Curious’ during the former’s summer North American tour.
Last month, Swift was named as the “most influential” Twitter user of 2018 – despite only tweeting 13 times this year.